Method of adjusting grinding-rolls



(N0 Model R. A. MURRAY.v

METHOD OF ADJUSTING GRINDING ROLLS.

Patented June 2,1891.

v v n A 770% WITNESSES:

m: mama wanna cm, PHOYO L v UNITED STATES PATENT OFFICE.

ROBERT A. MURRAY, OF BO NN E TERRE, MISSOURI.

METHOD OF ADJUSTING GRINDING-ROLLS.

SPECIFICATION forming part of Letters Patent No. 453,376, dated June 2,1891.

I Application filed October 18, 1890. Serial No. 368,567- (No model.)

To all whom, it may concern:

Be it known that I, ROBERT A. MURRAY,

of the city of Bonne Terre, St. Francois coun-- ty, State of Missouri,have invented certain new and useful Improvements in Method of and Meansfor Adjusting Grinding-Rolls, of which the following is a full, clear,and exact description, reference being had to the accompanying drawings,forming a part hereof.

My invention relates to improvements in methods of and means foradjusting grinding-rolls while they are in motion and workingunder fullgrinding pressure or strain; and it consists in the novel arrangementand combination of parts, as will be hereinafter more fullydescribed,and designated in the claim.

The object of my invention is to accurately adjust or tram the rollsWhile they are in operation with the. full grinding pressure applied,and obviate the necessity whiohhas existed heretofore of abating the.operation'of the rolls in order to accomplish the desired purpose.

Heretofore the rolls have been adjusted by adjusting the bearing of saidrolls with a frame or instrument slid in at ends of rolls resting on thebearings or adjoining parts of bearing, or by a frameor plate placed ontop of rolls and tipping the plate to find the high and low points to beadjusted, which adjustments could only be accomplished by first stoppingthe revolution of the rolls and then effecting the desired adjustment.After this adjustment,when the rolls are put in motion the tension orforce of the belt pulling down on the belt end of roller shaft whiletheface or outside grinding-surface of roll is running with grindingpressure at a differential or faster speed against the adjoining rollwill again dislocate the roll out of proper grinding posi-,

tion.

My invention is to obviate the necessity of stopping the revolution ofthe rolls. I bring about the proper adjustment by the kn-owl edge of thefriction of the grinding-surfaces of the rolls against a planometricalplate or disk while the same are in grinding motion and the grindingpressure applied.

In the drawings, Figure 1 is a top plan view of the radial disk or plateused in carrying Outmy invention. Fig. 2 is a side View of the same.Fig. 3 is a side elevation of my invention as shown when applied torolls when out of their proper adjustment. Fig. 4 is a top plan View ofthe same as shown when applied to rolls when in their properadj ustment.

Referring to the drawings, 1 represents a planometrical wheel or plateof any shape or of any metallic or suitable substance, and whosesuperficial dimensions correspond and are homologous to the planesurface tangentially described on the grinding-surface or circumferenceof the rolls while in motion when in proper order for performing thenecessary functions. The contact-face of said plate or disk shouldpresent a perfectly smooth surface, so that all the points or protrudingmolecules or atoms should lie in the same lineal plane.

2 represents an elevation or protuberance formed upon or attached tosaid plate,(which should always be centrally located,) which serves as athumb-grip and pivotal attachment when said disk is applied to therolls. This may be dispensed with, if desirable so to do.

3 3 represent grindingrolls of ordinary construction when out of properadjustment and conceived to be mounted in suitable'and ordiharyframe-work. 4 4 are the journals on which said rolls are respectivelymounted. Said journals extend beyond the terminal portions of said rollsand are mounted in suitable bearings, whereby said bearings can beeasily elevated or depressed and brought in proper adjustment, andconsequently the rolls mounted thereon may be so adjusted.

Having sufficiently described my invention I will now proceed todescribe more in detail its application and use, in order that itsessential features may be more fully appreciated.

\Vhen it is desired to adjust the rolls,whicl1 can be ascertained byinspecting the crushed grain, to wit: when the rolls are out of the sametangential plane, the median portion of said rolls are brought in closerproximity by such dislocation, and consequently the grain which passesthrough said portions of the rolls is ground finer than that whichpasses through other portions of the rolls. The ultimate tendency ofsuch dislocation is to cause the median portion of the rolls to be wornaway or hollowed out, and thereby rendering them worthless for grindingpurposes. The dislocation of the rolls being established by inspectionof the crushed grain, as before stated, the operator in proceeding tobring about the proper adjustment should grasp the elevated portion orhandle and place his hand upon the center of the radial disk or plateand gently apply it horizontally and simultaneously on the rolls whilein functional revolution and grinding pressure applied. The contactparts of the rolls being out of the same horizontal plane consequentfrom dislocation of the journals on which they are mounted, striking byfriction against the surface of the disk or plate will impart to it arevolving motion, and this uneven motion will continue until all thecontact point-s of said rolls are brought in the same tangential plane,and then the disk or plate will adjust itself in stem quo in a planeparallel to the tangential plane of the rolls. It will be furtherobserved that the tendency of the planometrical plate or disk to turn orrevolve when applied to the grinding-surfaces of the rolls indicatesthat the same are out of proper adjustment. After the proper adjustmentof the rolls is made the disk or plate will lose its tendency torevolve, remaining stationary, or nearly so, which is ascertained by thesense of touch, by which means the operator is informed that the rollersarc in proper relative position.

It is not necessary for the operator to firmly grasp the handle shown inFig. 2 during use of the disk, as such a hold upon it would prevent itsrotation While in position upon the rolls; but this form of handle maybe used much the same as the form shown in the other figures of thedrawings by simply resting the hand upon its upper surface, as will bereadily understood.

Having fully described myinvention, what I claim is- Theherein-described method of adjusting the relative grinding-surfaces oftwo or more rolls while in motion, which consists in removably placing aplanometrical disk or plate simultaneously in contact with thegrindingsurfaces of said rolls in a plane tangential to thecircumference of the rolls, then adjusting the axes of said rolls untilcontact of their several grinding-surfaces is made with said plate ordisk throughout the length of each roll, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

ROBERT A. MURRAY. \Vitnesses:

V. E. FITE, G. W. GROVER.

